I just got a reply from one of the techs at PIE (Precision Interface Electronics). They're one of the largest manufactures of automotive audio and other adapters. I questioned whether the part they're developing for the current model Ford pickup would work in our 'stangs, this is what I got:

Granted it ain't "now" but it looks like help is on the way at least

 

Any idea what kind of input this part will accept? This sounds like good news.

 

As far as I can determine it would accept a regular audio input, which would work fine for most devices (XM, Sirius, MP3 players, etc)

 

Well, don't get too excited just yet. I've been hearing the same rumors since I bought my '04 F-150 back in late '03. I've gone the FM mod route with the XM Commander in both the truck and the '05 Stang.

They've claimed to be "developing" an adapter for 18 months now.

How hard could it be?

Pretty hard, apparently! :bang:

 

I researched the aux adapter subject, the new stereo in the Mustang is basiclly the same as the new Ford Focus, Five Hundred, Freestyle, Freestar, F-150, Super Duty; Mercury Monterey, Milan, Montego; and Lincoln Mark LT. The P.I.E. adapter that states, "MUST have the "CD/AUX" on radio" is for the Visteon manufactured CD6. http://www.visteon.com/products/automotive..._music_spec.pdf

 

True, the one being discussed here is an unreleased prototype that was tested on the Mustang Shaker though